::: Solar Hot Air System :::   

This system is consisted of 2m × 2m collectors, and can raise the room temperature up to 40 degrees centigrade. This system is used to produce warm air for industrial and semi-industrial processes. Inside the system the sun rays pass through a glass sheet and then are absorbed by an absorbent sheet. The sun rays with a short wave-length passes through glass sheet and after getting absorbed by the absorbent sheet, they are changed to rays with longer wave-lengths which cannot pass through the glass sheet anymore, so they remain in the collector space and make it warm. This warm air can be transferred to desired area.